Comment 21 for bug 121734

Going through our remove.nonfree script is on my TODO list. I know a bunch of the files there are actually source. Some others are definitely not, such as, iirc, some WinCE .dlls, or various binaries (NSIS ones being one set among others).

Anyways, it's better for us to have false negatives than false positives, which is why we are still removing the same files ; plus the fact that they aren't used during build.